Improvement in let-off mechanism



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. Leers Poem No. 92,305, daad .my e, i869.

mrRovnMnNT 1N LET-Orr MECHANISM ron Looms.

The Schedule referred to in these Letters Patent and Apeut of the same.

To all whom it may concern,

Be it known that I,`WILLIAM HALL, of North Adams, in the countyl ofBerkshire, and State of Massachusetts, have invented certain new and`use? ful Improvements in' ,Let-Oil' for Looms; and I do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, 'and to the letters ofreference marked tl1ereon,which form a part of this speciiication, andin which is represented` a perspective viewof vmy let-off for looms.

The nature of my invention consists in producing a graduated i'rictionailet-off, by the employment of a pivoted lever having a self-adjustingpress-plate at one end, the other end operating on a sliding plate so,arranged as to gradually lessen the friction ou the warpheam. Y

To enable others skilled inthe art to whiclrmy invention appertains tomake and use the same, l will now describe its construction andoperation.

In the accompanying drawing- A represents the loom-frame, and

B, a warp-beam, with journals b b working in journal-boxes in the sidesof the frame.

I) D are metalY wheels, made as seen in the drawing, and attached toeach end of the beam B.

d. (l represent straps or bauds, attached each at one end, to thecross-lbar G of the ii'ame A, and passed over the wheels D D, andsecured to the eye-bolts b bf, secured in the levers a a. Y i

These levers are pivoted at their outer'ends to the cross-bar G, andtheir inner ends resting against the under surface of the sliding plateb", working in the guide-plate b", attached to therear side of thecrossbar O. A

d represents a stud firmly attached to the cross-bar,

to which is pivoted the' upright lever e, made as seenk in the drawing,and `provided at its upper end with the pivoted press-plate e', and atits lower end' with the projection f, which'presses against the slidingplz te b.

The-operation ot' my machine'is as follows: Thewarp is wound round thebeam B, and as 1t 1s `let olf, the diameter is diminished; but by thelevel' e acting upon the sliding plate b and the levers a a,

the bands'd ll keep anniform strain upon` the warp until the whole islet oi. f Y `Having thus* described 'my invention, E

lVhat I claim as new, and desire to secure 4by Letters Patent, is

The pivoted lever e, provided with press-plate c' and projection f, iucombination with sliding plate b", guide b, levers a a, and bands d d,all arranged asrand for the purpose described.

In testimony that I'claim the foregoing as myown, I zix my signature, inpresence of two Witnesses.

` WILLIAMy HALL.

Witnesses:

W. B. MITCHELL, L.,W. WHITE.

